Method for analyzing hot corrosion performance of nickel-based single crystal superalloy

Abstract

The disclosure provides an analysis method for the hot corrosion performance of nickel-based single crystal superalloy, and belongs to the technical field of alloys. The analysis method comprises thefollowing steps: providing a nickel-based single crystal superalloy initial sample to be analyzed; carrying out a hot corrosion test on the initial sample to obtain a test sample to be analyzed; obtaining a morphology graph and a corrosion product analysis result of the surface area of the test sample; cutting the test sample to obtain a metallographic sample to be analyzed; obtaining a cross section morphology graph and a cross section corrosion layer analysis result of the metallographic sample; and comprehensively evaluating the hot corrosion performance of the nickel-based single crystal superalloy by combining the morphology graph and the corrosion product analysis result of the surface area of the test sample and the cross section morphology graph and the cross section corrosion layer analysis result of the metallographic sample. According to the analysis method, the hot corrosion performance of the alloy can be evaluated more comprehensively and accurately, and the reliability of hot corrosion performance evaluation is improved.

Description

technical field [0001] The disclosure relates to the field of alloy technology, in particular to a method for analyzing the thermal corrosion performance of a nickel-based single crystal superalloy. Background technique [0002] Nickel-based single crystal superalloys have excellent mechanical properties and good high temperature resistance, and are widely used in aero-engines. The internal structure of the engine is complex, whether it is the engine's combustion chamber, guide vanes, turbine blades or turbine discs, materials are required to have good resistance to high temperature oxidation and gas thermal corrosion, as well as good cold and heat fatigue performance. Therefore, materials are required to have extremely high high temperature tolerance, high temperature oxidation resistance and thermal corrosion resistance, excellent creep resistance and durable fracture resistance, good mechanical fatigue and thermal fatigue performance, and good high and medium temperature ...

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Problems solved by technology

The hot corrosion of the alloy will accelerate the initiation and expansion of cracks on the surface of the turbine blade. When the hot corrosion of the alloy interacts with creep and fatigue, it will cause the failure of the blade and greatly reduce the service life and reliability of the turbine blade.

Traditional research on hot corrosion performance mostly uses weighing method to study hot corrosion kinetics, or uses optical microscope to characterize the surface of materials to determine the hot corrosion resistance of alloys, but the analysis of these methods is not comprehensive enough, and the analysis results of the corrosion layer Not precise enough

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